Lycoming 66K6D3Sn-02 EIS Electronic Ignition System

The Lycoming Electronic Ignition System (EIS), part number 66K6D3SN-02, is a solid-state electronic ignition module for replacement of magnetos on applicable six-cylinder Lycoming piston engines.

This version is configured for 25° fixed ignition timing. The EIS design has no moving parts and is intended to provide a magneto-replacement solution with straightforward installation and engine-start capability.

• Manufacturer: Lycoming Engines
• Manufacturer part number: 66K6D3SN-02
• Configuration: 6-cylinder, 25° fixed timing
• System type: Electronic ignition system / magneto replacement
• Listed weight: 2.268 kg

Confirm the engine model, rotation, ignition timing shown on the engine data plate, installation configuration and all applicable airframe approval requirements before purchase or installation. Installation and maintenance should be carried out in accordance with the latest applicable Lycoming instructions and approved data.

Relevant manufacturer documentation includes Lycoming Service Instruction SI 1569 for EIS installation, operation and maintenance, and Service Instruction SI 1443 for approved EIS engine applications.